ClickHouse/src/Interpreters/Cache/FileCacheFactory.cpp

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#include "FileCacheFactory.h"
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#include "FileCache.h"
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namespace DB
{
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namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
}
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FileCacheFactory & FileCacheFactory::instance()
{
static FileCacheFactory ret;
return ret;
}
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FileCacheFactory::CacheByName FileCacheFactory::getAll()
{
std::lock_guard lock(mutex);
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return caches_by_name;
}
FileCachePtr FileCacheFactory::getOrCreate(
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const std::string & cache_name, const FileCacheSettings & file_cache_settings)
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{
std::lock_guard lock(mutex);
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auto it = caches_by_name.find(cache_name);
if (it == caches_by_name.end())
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{
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auto cache = std::make_shared<FileCache>(file_cache_settings);
it = caches_by_name.emplace(
cache_name, std::make_unique<FileCacheData>(cache, file_cache_settings)).first;
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}
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return it->second->cache;
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}
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FileCacheFactory::FileCacheData FileCacheFactory::getByName(const std::string & cache_name)
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{
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std::lock_guard lock(mutex);
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auto it = caches_by_name.find(cache_name);
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if (it == caches_by_name.end())
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "There is no cache by name: {}", cache_name);
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return *it->second;
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}
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}